Occurrence of Perfluoroalkyl Acids Including Perfluorooctane Sulfonate Isomers in Huai River Basin and Taihu Lake in Jiangsu Province, China
Occurrence of Perfluoroalkyl Acids Including Perfluorooctane Sulfonate Isomers in Huai River Basin and Taihu Lake in Jiangsu Province, China
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中国江苏省淮河流域和太湖地区全氟烷基酸（包括全氟辛烷磺酸异构体）的存在
DOI：
10.1021/es3037803
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发表时间：
2013-01-15
影响因子：
11.4
通讯作者：
Yu, Hongxia
中科院分区：
文献类型：
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作者：
Yu, Nanyang;Shi, Wei;Yu, Hongxia
研究了江苏淮河流域和太湖地表水全氟辛烷磺酸（PFOS）中线性和支链（6个单三氟甲基异构体）10种全氟烷基酸的空间分布。淮河流域水样以全氟辛酸（PFOA）和全氟辛烷磺酸（PFOS）为主，平均含量分别为18 ng/L和4.7 ng/L；太湖水样以全氟辛烷酸（PFOA）、全氟己酸（PFHxA）和全氟辛烷磺酸为主，平均含量分别为56 ng/L、19 ng/L和15 ng/L。太湖样品中支链PFOS （Br-PFOS）异构体含量占总PFOS的48.1% ~ 62.5%，高于电化学氟化（ECF） PFOS (Br-PFOS相似30.0%)，而淮河流域样品中未发现类似现象（Br-PFOS 29.0 ~ 35.0%）。对个体异构体百分比的主成分分析（PCA）表明，前两个成分分别占观察数据总方差的78.4%和15.3%。将淮河流域的样品与ECF PFOS标准归为一类，两者的异构体剖面相似；将太湖的样品单独归为一类，表明其异构体剖面与淮河流域不同。异构体分布的明显差异可能是由于全氟辛烷磺酸异构体和/或未知来源（全氟辛烷磺酸或全氟辛烷磺酸前体）的不同环境行为造成的。
The spatial distribution of 10 perfluoroalkyl acids including linear and branched (six monotrifluoromethyl isomers) perfluorooctane sulfonate (PFOS) in surface water was investigated in Huai River Basin and Taihu Lake in Jiangsu Province, China. In the water samples from Huai River Basin, perfluorooctanoic acid (PFOA) and PFOS were the predominant compounds (mean 18 ng/L and 4.7 ng/L, respectively), while in samples from Taihu Lake, PFOA, perfluorohexanoic acid (PFHxA), and PFOS were the predominant compounds (mean 56 ng/L, 19 ng/L, and 15 ng/L, respectively). Branched PFOS (Br-PFOS) isomers accounting for 48.1% to 62.5% of total PFOS were enriched in all samples from Taihu Lake, compared to technical electrochemical fluorination (ECF) PFOS (Br-PFOS similar to 30.0%), while the similar phenomena were not found in samples from Huai River Basin (Br-PFOS 29.0-35.0%). Principal component analysis (PCA) on the percentages of the individual isomer showed that the first two components accounted for 78.4% and 15.3% of the overall observed data variance. Samples from Huai River Basin were grouped together with the ECF PFOS standard suggesting the profiles were similar, while samples from Taihu Lake were grouped by themselves, suggesting that isomer profiles in these samples were different from that of Huai River Basin. The obvious difference in isomer profiles probably results from the different environmental behaviors of PFOS isomers and/or unknown sources (PFOS or PFOS precursors).